abstract:Bombyx is the genus of true silkmoths or mulberry silkmoths of the family Bombycidae. For a few thousand years, people only recognised 2 species, but then several other less important species were discovered, and the genus contains 2 tested hybrid species- a semi-natural cross between a female Bombyx Mori and a male Bombyx Mandarina, and an other hybrid the other way around from the first.